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examples/tutorial/first.cc is a basic C++ program provided for ns-3 beginners. A line by line explanation of first.cc is provided in the ns-3 tutorial. Understand the working of first.cc from the tutorial, and then proceed with the following steps:

1. Copy first.cc from examples/tutorial and paste it in scratch directory.
2. Modify first.cc in scratch directory to enable the support of ASCII traces. You can see examples/tcp/tcp-bulk-send.cc as a reference to do this.
3. Ensure that the ASCII trace file is generated for first.cc. Attach the trace file for evaluation.
4. Make a patch with the modifications made in first.cc and send it for evaluation.
5. Download 'TraceMetrics' tool. It is a trace file analyzer for ns-3.
6. Load the trace file generated for first.cc in TraceMetrics and send a snapshot of the statistics shown in TraceMetrics.